Dude, testing should not be seen as discrimination. I understand your point in a case when one person (due to "her" appearance) is the only one tested but Regs, I believe, is talking about something entirely different here.
I don't view it as discrimination. I do view it as very unfortunate, but a necessary part of trying to establish a level of fairness. The irony is, if you pull of a girl for testing, and you are WRONG, there is a very human side relating to the damage to her reputation.
Again, no winners on this.